# CVE-2021-25273: Cross-site scripting in Sophos UTM

> Stored XSS in Sophos UTM allows administrators to execute arbitrary code via quarantined email details, requiring an upgrade to mitigate.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 29 Jul 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4p5x-52qw-grgg

## What is CVE-2021-25273?

CVE-2021-25273 is a medium-severity cross-site scripting vulnerability in Sophos UTM, published on 29 Jul 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Stored XSS can execute as administrator in quarantined email detail view in Sophos UTM before version 9.706.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-25273?

It affects 1 product.


Products: Sophos Unified Threat Management.

## How do I fix CVE-2021-25273?

No fix has been published for CVE-2021-25273 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25273 being exploited?

There is no known exploitation of CVE-2021-25273 in the wild and no public exploit code.

## Other vulnerabilities in Sophos UTM

- [CVE-2020-25223](https://insights.sbomify.com/CVE-2020-25223/): Sophos SG UTM Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2022-0386](https://insights.sbomify.com/CVE-2022-0386/): SQL injection in Sophos UTM (high 8.8)
- [CVE-2014-2537](https://insights.sbomify.com/CVE-2014-2537/): Denial of service in n/a (high 7.8)
- [CVE-2022-0652](https://insights.sbomify.com/CVE-2022-0652/): Information disclosure in Sophos UTM (low 3.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25273 and fix it if it is affected.

What it is: CVE-2021-25273 is a medium-severity cross-site scripting vulnerability in Sophos UTM, published on 29 Jul 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-25273 in the wild and no public exploit code.

Affected product: Sophos UTM. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-25273/ (Markdown: https://insights.sbomify.com/CVE-2021-25273/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25273
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25273
- OSV: https://osv.dev/vulnerability/CVE-2021-25273

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25273/
Summaries are generated and may contain mistakes; the official description above is the record.